ASTM E903 Solar Absorptance, Reflectance, and Transmittance of Materials Using Integrating Spheres

ASTM E903 is a standardized test method used to determine the solar absorptance, reflectance, and transmittance of materials. This test provides essential data for evaluating how materials interact with solar energy, which is crucial for applications in building design, energy efficiency, and renewable energy technologies.


Introduction to ASTM E903

ASTM E903 outlines a systematic procedure for quantifying the solar energy interaction of materials. Solar absorptance, reflectance, and transmittance are key factors that influence a material’s thermal performance, energy efficiency, and suitability for solar applications. This test method enables engineers and researchers to make informed decisions when selecting materials for solar collectors, building envelopes, and sustainable design projects.

Understanding how materials interact with solar radiation is vital for optimizing energy use and reducing environmental impact. Materials with high solar absorptance can efficiently absorb solar energy, making them ideal for solar thermal applications. In contrast, materials with high solar reflectance can help reduce heat absorption, enhancing building cooling efficiency and reducing the urban heat island effect.

ASTM E903 Test Method

The ASTM E903 test method involves exposing a material specimen to solar radiation and measuring its solar absorptance, reflectance, and transmittance using appropriate instrumentation. The test is conducted in the following steps:

Specimen SetupThe material specimen is mounted on the entrance aperture of the solar spectrophotometer. The spectrophotometer exposes the specimen to solar radiation, simulating natural solar conditions.
CalculationThe spectrophotometer measures the solar energy reflected, transmitted, and absorbed by the material. The solar absorptance, reflectance, and transmittance values are calculated based on the measured solar energy data.

ASTM E903 Specimens

Specimen detailsThe material specimen used in the test is a representative of the material being evaluated.
Specimen dimensionsSpecimens with dimensions larger than the measurement aperture are used to ensure accurate and representative results.
Specimen preparationThe material specimen is carefully prepared to ensure a clean and uniform surface eliminating surface imperfections and contaminants.

ASTM E903 Results

The test method ASTM E903 results provide solar absorptance, reflectance, and transmittance values for the material at specific wavelengths across the solar spectrum. These values indicate how the material interacts with solar radiation and its potential performance in solar energy applications.

Tests Related to ASTM E903

ASTM G173 – Standard Tables for Reference Solar Spectral Irradiances and ASTM G197 – Standard Table for Reference Solar Ultraviolet Spectral Distributions are the related standards.


Where can I get the astm e903 tested?

You can share your astm e903 testing requirements with MaTestLab. MaTestLab has a vast network of material testing laboratories, spread across the USA and Canada. We support your all material testing needs ranging from specific astm e903 test to various testing techniques.

How much do I need to pay for the astm e903 test?

Please contact us for a detailed quote for your astm e903 testing needs. Cost incurred to carry out different astm e903 testing methodology depends on the type of raw material; number of samples, coupons, or specimens; test conditions, turn around time etc. Costs of some ASTM testing methods start from $100 and the final value depends upon the factors listed above. Please contact us for the best and latest prices.

How many samples are required for astm e903?

The required number of samples or specimens should comply with the procedure given in the astm e903 standard. However, the MaTestLab operations team can assist you for your special requirements once you share your testing details with us.

How much discount can I get on the astm e903 test?

MaTestLab has a vast testing laboratory network, hence we bring you the best testing facilities in a cost-effective way. We offer considerable discounts (15-20%) to our returning customers based on test volume and frequency.

How many days will it take to complete the astm e903 test?

The turnaround time for astm e903 test methodology depends upon the test procedure mentioned in the standard test document. However, we at MaTestLab understand your research requirements and hence try to get your test completed within the least possible time.

Where can I get the astm e903 tested?

You can share your astm e903 testing requirements with MaTestLab. MaTestLab has a vast network of material testing laboratories, spread across the USA and Canada. We support your all material testing needs ranging from specific astm e903 test to various testing techniques.

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    You share your testing requirements

  • STEP 02

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  • STEP 03

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